Question

Find x: f(x)=400 - 4/5x.

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ANSWERED
asked 2020-12-15
Find x: \(\displaystyle{f{{\left({x}\right)}}}={400}-\frac{{4}}{{5}}{x}.\)

Answers (1)

2020-12-16
For the x-intercept, let y = 0
So \(\displaystyle{0}={400}-\frac{{4}}{{5}}{x}\)
Subtract 400 from both sides
\(\displaystyle-{400}=-\frac{{4}}{{5}}{x}\)
Multiply both sides by \(\displaystyle-\frac{{5}}{{4}}\)
x = 500
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